Radio apparatus



April 15, 1930. A. F. SANFORD RADIO APPARATUS Filed Oct. 8, 1925 4 Sheets-Sheet A6 61 314mm 1W v flccomw El 3 :91 55)! 19 9528:. u 51 April 15, 1930. SANFORD 1,755,028

RADIO APPARATUS Filed Oct. 8, 1925 4 Sheets-Sheet 2 63. m F6 E6 PM 1g M 5 /H6 s I U M WW l I l-l|1|lHllllll\lll\Illlllllll IIIIVIIIWITHI 7 5 E11 3 gwuzwtoz A. F. SANFORD RADIO APPARATUS April 15, 1930;

Filed Oct. 8 1925 4 Sheets-Sheet I5 n n m in r Nu m DCIDDDUU D'U April 15, 1930. I A. F. SANFORD I 1,755,028

RADIO APPARATUS Filed Oct. 8, 1925 4 Sheets-Shet 4 y w 2 El in. E4

XIV

Patented Apr. 15, 1930 ALFRED F. SANFORD, OF KNOXVILLE, TENNESSEE RADIO APPARATUS Application filed October 8, 1925. Serial No. 61,296.

This apparatus relates especially to means for bringing a radio-receiving apparatus into tune with the sending apparatus at different sending stations.

An object of this invention is to associate with the tuning members of a radio-receiving apparatus means for moving the tuning members into positions whereby they are brought into tune with a sending apparatus of chosen sending stations, the receiving apparatus including members bearing record receiving surfaces and'movable in fixed relation with the tuning members, to the end that when the tuning members have been moved into positions bringing those members into tune with the sending apparatus of a chosen sending station, suitable records may then be made on the record-receiving surfaces, which records then stand in fixed relation to the then positions of the tuning members, so that thereafter those tuning members may be again brought into tune with the apparatus of that sending station by moving said tuning members until the appropriate records of said record-receiving surfaces are again in the position in which they were made. It might also be said that the members bearing the record-receiving surfaces may be moved until 'those records are again in the positions in which they were made. For, as already stated, there is to be a fixed relation between the tuning members and the members hearing the record-receiving surfaces.

The apparatus illustrated and described by this application comprises three tuning shafts and three endless belt form members each arranged in relation with one of the three tuning shafts. The outside faces of these endless belts constitute record-receiving surfaces. These belts are arranged to travel when the tuning shafts areturned, such travel of the belts having a fixed relation with the turning of the tuning shafts, but at a higher velocity, in order that a long part'of each belt will traverse a given point while the tuning shafts undergo only slight turning movements.

whereby a large recording surface is provided in relation to a small turning movement of the tunin shafts. This large recording sur-- face is to e utilized for receiving means for identifying various sending stations which are operating on wave lengths within the range of the receiving apparatus. The three endless belts are arranged sideby side and with parts of their surface in a common plane, in order that records relating to a given sending station may be placed on the belts on a common horizontal line, if the operator so desires.

In the accompanying drawings,

Fig. 1 is a front elevation of an apparatus embodying my improvement;

Fig. 2 is an elevation of a part of the left hand end of the apparatus;

Fig. 3 is an upright section on the line, 33, of Fig. 5, looking rearward;

Fig. 4 is an upright section on the line, 4-4, of Fig. 5, looking forward;

Fig. 5 is a'section on the line, 5-5, of Fig. 3, looking downward;

Fig. 6 is an upright section on the line 6-6, of Figs. 1', 3 and 5, looking toward the right;

Fig. 7 is an upright section on the line, 17-57, of Figs. 1, 3 and 5, looking toward the Fig. 8 is a detail section on the line, 88, of Fig. 5;

Fig. 9 is an uprightsection on the line, 99, of Fig. 5, looking toward the right, (this section is below the right hand tuning shaft) Fig. 10 is an upright transverse section on the line, 10-10, of Fig. 5, looking forward.

Referring to said drawings, A is the front wall of the apparatus. A is the base. A is the top wall. A is the right hand upright wall. A is the left hand upright wall. A is inner upright wall parallel to the front wa A middle tuning shaft, B, extends horizontally through a bearing B in the front wall, A, and through a bearing, 13, in the inner wall, A.

At the rear of the bearing, B, a collar, B, surrounds and is fixed to the shaft, B, and bears two diametrically opposite radial pins, 13. On the bearing, B, is a horizontal pin,

extending rearward into t Path of the pins, B. When the shaft, B, is being turned, that movement is arrested when one of the ins, B, meets the pin, B. Since the pins,

are diametrically opposite each other, only a one-half turn of said shaft is permitted. (See Figs. 5 and 10.) On the front end of the shaft, B, at the front of the wall, A, is a hand knob, B, by means of which said shaft may be turned.

The right hand tuning shaft, C, extends horizontally through a bearing, C in the front wall, A, and through a bearing, Q 1n the inner wall, A". At the rear of said bearing a collar, O surrounds and is fixed to .the shaft, C, and bears two diametrically opposite radial pins, C. On the. bearing, C 1s a horizontal pin, C, extending rearward into the path of the pins, C. When the shaft, O,

is turned, that movement is arrested when one of the pins, C, meets the horizontal pin-,- 0. Since the ins, C, are diametrically opposite each ot er, only a one-half turn of said shaft is permitted. On the front end of the shaft, C, outside the wall, A, a hand knob, C, surrounds and is fixed to the shaft, 0. By means of said knob, the shaft, C, may be turned. I

D is the left hand tuning shaft. It extends horizontally through a bearing, D in the front wall, A, and through a bearing, D in the inner wall, A". At the rear of said bearing a collar, D surrounds and is fixed to the shaft, D, and bears two diametrically opposite radial pins, D. On the bearing, D is a horizontal pin, D extending rearward into the path of the pins, D. When the shaft, D, is turned, that movement is arrested when one of the pins, D, meets the horizontal pin, D Since the pins, D, are diametrically opposite eachother, only a onehalf turn of said shaft is permitted. On the front end of the shaft, D, outside the wall, A, a hand knob, D, surrounds and is fixed to the shaft, D. By means of said knob, the shaft, D, may be turned.

Parallel to the tuning shafts are four drum-supporting shafts, E, F, G, and'H. Said shafts have their ends resting immovably in the front wall, A, and the inner wall, A. The shaft, E, is in the upper right hand part of the structure. The shaft, F, is in the lower right hand part of the structure. The shaft, G, is in the lower left hand part of the structure. The shaft, H, is in the upper left hand part of the structure. On the shaft, E, are a front drum, E, a middle drum, E and a rear drum, E. On the shaft F, are a front drum, F a middle drum, F and a rear drum, F". On the shaft, G, are a front drum, G a middle drum, G and a rear drum, G. On the shaft, H, are a front drum, H, a middle drum, H, and a rear drum, H. a

All these drums are loose on their shafts and rotatable, independently of each other.

On each end of the drum, E are radial lugs or teeth, 0 On each end of the drum, F are radial lugs, P. On each end of the drum, G are radial lugs, g On each end of the drum, H are radial lugs, 71. On one end of each of the drums, E E F F ,'G G H and H are similar radial lugs, 6 e fag g g h and h", respectively.

n endless belt, I, extends around the four drums, E F G and H Said belt is as wide as the length of those drums and has along its edges perforations to receive the teeth, 6 f 9 and h. The engagement thus made between the drums and the belt is for the purpose of compelling the belt to travel accurately with the drums and particularly with the one of the four drums which is driven, as will appear further on.

An endless belt, I surrounds the tlrums, E F G and H That belt is as wide as the length of those drums and along one edge it has perforations to receive the teeth, 6", f 9 and h of those drums.

An endless belt, I surrounds the drums, E F G and H Along one edge said belt has perforations to receive the teeth, e, f 9 and h of those drums.

The engagement made between these smaller belts and the smaller drums is for the purpose of compelling the belts to move accurately in unison with the drums.

'The belt, I, is driven by the long drum, F which is turned in unison with the middle tuning shaft, B, through gearing intervening that drum and the shaft, B. The belt, I is driven by the short drum, E which is driven in unison with the right hand tuning shaft C, through gearing intervening that drum and the shaft, O. The belt, I is driven by the short drum, H which is turned in unison with the turning of the left hand tuning shaft, D, through gearing intervening that drum and the shaft, D.

Fixed on the forward end of the long drum, F and free from the shaft, F, is a pinion, F That pinion meshes with an idle spur gear wheel, F", which is rotatable on a stub shaft, F, supported on the inner face of the front wall, A. (Fig. 9.) The wheel, F, in turn meshes with a spur gear wheel, F surrounding and fixed to the tuning shaft, B.

The short drum, E has a sleeve, E, extending rearward loosely around the shaft, E, and loosely through the rear drum, E At its rearend said sleeve is formed with gear teeth to constitute a pinion, E That pinion meshes w ith a small idle spur gear wheel, E", which is supported on a stub shaft, E which is seated on the forward face of the inner wall, A. (Fig.8.) This idle wheel bears against the rear face of the drum, E and is thereby held from leaving said stub shaft. The wheel, E", meshes with the spur gear wheel, E, which surrounds and is fixed on the right hand tuning shaft, C.

Ill

' tuning shaft, B, will cause simultaneous movement of the wide endless belt, I, and that turning the right hand tuning shaft, C, will cause movement of the middle endless belt, I and that turning the righthand tuning shaft, D, will cause turning of the rear endless belt, I It has already been explained that the tuning shafts are to be turned by the aid of the hand knobs attached to said shafts. But it is to be observed that the gearing between each of'the tuning shafts and the associated endless belt causes a long movement of the belt during limited movement of the tuning shaft, so that a considerable portion of the belt corresponds to a slight turning movement of the associated tuning shaft.

In the left hand uprightwall, A is an opening, A, wide enough to expose the three belts and high enough and low enough to ex-' pose substantially all of the adjacent upright parts of the belts. At about the middle of the opening, A, an abutment bar, A extends horizontally from the front wall, A, to the inner wall, A and is supported by said walls adjacent the inner faces of the three belts. (This abutment bar is omitted from Fig. 2.) Said bar is to serve as an abutment or rest against which the belts may bear while writing is being placed 'on the belts. A slotted guide bar A", is placed horizontally across the opening, A and adjacent the outer faces of the three belts and at the height of the abutment bar, A. This bar is to serve as a guide for placing records on the belts.

The outer faces of the belts, I and I are blank record-receiving surfaces when the apparatus is manufactured, At the rear edge of the belt, I, (the left hand edge is viewed in Fig. 2) consecutive or serial numbers are placed along the entire length of the belt. Fig. 2 exposes a part of such numbers-from 48 to 58, inclusive. Fig. 5 exposes those numbers from 21 to 41, inclusive.

The outer faces of the three belts being blank, excepting for said serial numbers, a chosen sending station is to be found by turnsymbolsrepresenting that station. In Fig. 2,

the receiving operator has written Miami, and the letters, WMBF. In the same space, this front belt bears the serial number, 54. The operator writes this number, 54, on each of the other belts. Thus the entire rec- 0rd, standing in a horizontal line, on the recording surfaces exposed through the slotted guide bar, A reads 54-5454lVMBFMiami. For the finding of other sending stations,

the three tuning shafts are to be turned independently of each other, whereby the three elements of this first record are moved away from the guide bar at different velocities, whereby these three elements are moved out of alignment. To again put this receiving apparatus into tune with this Miami station, it is only necessary for the operator to turn the hand knobs until these three elements are again opposite the guide bar slot-again in alignment with each other in the location in which the record of the Miami station was made.

To bring this receiving apparatus into tune with any other sending station, the three hand knobs are turned until that tuning has been effected. Then a record of that station is made in the manner already described for the making of the record of the Miami sending station. ,Fig. 2 shows such a record of Cuba with the identification symbol, GKW, and the serial number, 50, on the belt, I, and 50, on each of the other belts, the record elements on the three belts having been moved out of alignment. To again bring this apparatus into tune with the Cuba sending station, the hand knobs are to be turned to move the exposed parts of the belts downward until these three record elements are in the same horiozntal line opposite the slot of the guide bar, A".

It is to be understood that the endless belts illustrated by the drawings are usedv as a convenient form for illustration of this apparatus, and that these belts may be in other forms.

I claim as my invention:

1. In an apparatus of the kind described, the combination with a tuning shaft, of an endless belt occupying a path surrounding the tuning shaft, positive belt driving and supporting means intervening the tuning shaft and the belt, substantially as described.

2. In an apparatus of the kind described,

i th th ha d k bb B nd I), tif the combination with two tuning shafts, a

this receiving apparatus is found to be in tune with the apparatus at the sending station. When that has been accomplished, the receiving operator makes a record on the parts of the three belts seenthrou h the slotted guide bar, A. That is done y writing on the front belt, I, the name of the sending station, and also if desired, the letters or other hand knob on each of said shafts, of two endless belts each presenting a record-receiving surface and occupying paths surrounding the two tuning shafts, positive belt supporting and driving means intervening one of the tuning shafts and one of the belts, and positive belt supporting and driving means intervening the other tuning shaft and the in L0 other belt, and guide means adjacent said belts substantially as described.

3. In an apparatus of the kind described, the combination of a front upright wall and an upright wall parallel to the front wall, two tuning shafts supported by said walls, shafts parallel to the tuning shafts, a hand knob on each of said shafts, two endless belts each presenting a record-receiving surface and extending around the group of shafts formed by the tuning shafts and the parallel shafts, positive driving means intervening one of the tuning shafts and one of the belts, and positive driving means intervening the other tuning shaft and the other belt, and guide means adjacent said belts substantially as described.

4. In an apparatus of the kind described, the combination of a front upright wall and an upright wall parallel to the front wall, two tuning shafts supported by said walls,

- shafts parallel to the tuning shafts, a hand knob on each of said shafts, drums loose on the parallel shafts, two endless belts each presenting a record-receiving surface and extending around the group of shafts formed by the tuning shafts and the parallel shafts, positive driving means intervening one of the tuning shafts and one of the belts, and positive driving means intervening the other tuning shaft and the other belt, and guide means adjacent said belts substantially as described.

5. In an apparatus of the kind described, the combination with two tuning shafts, a hand knob on each of said shafts, of two endless belts each presenting a record-receiving surface and one bearing on a part of its record-receiving surface serial symbols arranged lengthwise of that belt, positive belt supporting and driving means intervening one of the tuning shafts and one of the belts, and positive belt supporting and driving means intervening the other tuning shaft and the other belt, and guide means adjacent said belts substantially as described.

6. In an apparatus of the kind described, the combination with two tuning shafts and a hand knob on each of said shafts, of a plurality of belts each presenting a record-receiving surface, means supporting said belts for movement independently of each other, positive driving means connecting one of the tuning shafts with the supporting means of one belt, positive driving means connecting the other tuning shaft with the supporting means of the other shaft, and a guide member adjacent the belts, substantially as described.

7. In an apparatus of the kind described, the combination of two tuning shafts, a hand knob on each of said shafts, two belts placed near each other and each presenting a recordreceiving surface, positive driving means intervening one of said shafts and one of said belts, and positive driving means intervening the other of said shafts and the other of said belts, and guide means adjacent said belts substantially as described.

8. In an apparatus of the kind described, the combination of a plurality of tuning shafts placed parallel to each other, a hand knob on each of said shafts, a plurality of belts occupying paths surrounding. the tuning shafts, a plurality of drum shafts, drums on each of said drum shafts, and gearing connecting each of the tuning shafts and a drum on a different drum shaft, substantially as described.

9. In an apparatus of the kind described, the combination of three tuning shafts placed parallel to each other, three endless belts occupying paths surrounding the tuning shafts, four drum shafts along and within said paths, three drums on each of said shafts, gearing intervening one of the tuning shafts and a drum on one of the drum shafts, gearing intervening the second tuning shaft and the second drum on another drum shaft, and gearing intervening the third tuning shaft and the third drum on another drum shaft, substantially as described.

10. In an apparatus of the kind described, the combination of three tuning shafts placed parallel to each other, three endless belts occupying paths surrounding the tuning shafts, four drum shafts along and within said paths, three drums on each of said shafts, gearing intervening one of the tuning shafts and a drum on one of the drum shafts, gearing intervening the second tuning shaft and the second drum on another drum shaft, and gearing intervening the third tuning shaft and the third drum on another drum shaft, said gearing leading from one tuning shaft being at one end of the apparatus and the gearings leading from the other two tuning shafts being at the other end of the apparatus, substantially as described.

11. In an apparatus of the kind described, the combination of two tuning shafts parallel to each other, a hand knob on each of said shafts, two endless belts placed near each other and in planes perpendicular to said shafts and in endless paths surrounding said shafts and each belt presenting a record surface, two groups of rollers each group supporting one of said belts independently of the other belt, positive driving means intervening one of said shafts and a roller of one of said groups, and positive driving means intervening the other of said shafts and a roller of the other of said groups, whereby each belt will travel in relation to the rotation of its tuning shaft, whereby, after both shafts have been placed into tune position, each belt may receive a record of the position of its shaft, those records being adapted to serve as directions for subsequently replacing said shafts into the positions in relation with which the records were made.

after both shafts 12. In an apparatus of the kind described, the combination of an enclosing structure having in one of its walls an observation opening, two tuning shafts parallel to each other and to said wall, a hand knob on each of said shafts, two endless belts placed within the enclosing structure near each other and in planes perpendicular to said shafts and in endless paths surrounding said shafts and passing said opening and each belt presenting a record surface, two groups of rollers each group supporting one of said belts independently of the other belt, positive driving means intervening one of said shafts and a roller of one of said groups, and positive driving means intervening the other of said shafts and a roller of the other of said groups, whereby each belt will travel in relation to the rotation of its tuning shaft, whereby, after both shafts have been placed into tune position, each belt may receive a record of the position of its shaft, those records being adapted to serve as directions for subsequently replacing said shafts into the positions in relation with which the records were made. 7 13. In an apparatus of the kind described, the, combination of an enclosing structure having in one of its walls an observation opening, two tuning shafts parallel to each other and to said wall, a hand knob on each of said shafts, two endless belts placed within the enclosing structure near each other and in planes perpendicular to said shafts and in endless paths surrounding said shafts and passing said opening and each belt presenting a record surface, two groups of rollers each group supporting one of said belts independently of the other belt, positive driving means including cog-gearing intervening one of said shafts and a roller of one of said groups, and positive driving means including cog-gearing intervening the other of said shafts and a roller of the other of said groups, whereby each belt will travel in relation to the rotation of its tuning shaft, whereby, have been placed into tune position, each belt may receive a record of the position of its shaft, those records being adapted to serve as directions for subsequently replacing said shafts into the positions in relation with which the records were made.-

In testimony whereof I have signed my name, this 2nd day of October, in the year one thousand nine hundred and twenty-five.

ALFRED F. SANFORD. 

